CN108474317A - Method for knock detection, ignition timing control method and ITCS Ignition Timing Control System - Google Patents

Method for knock detection, ignition timing control method and ITCS Ignition Timing Control System Download PDF

Info

Publication number
CN108474317A
CN108474317A CN201680079336.9A CN201680079336A CN108474317A CN 108474317 A CN108474317 A CN 108474317A CN 201680079336 A CN201680079336 A CN 201680079336A CN 108474317 A CN108474317 A CN 108474317A
Authority
CN
China
Prior art keywords
frequency
pinking
waveform
window
ignition timing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201680079336.9A
Other languages
Chinese (zh)
Other versions
CN108474317B (en
Inventor
柚木晃广
竹本大育
古川雄太
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of CN108474317A publication Critical patent/CN108474317A/en
Application granted granted Critical
Publication of CN108474317B publication Critical patent/CN108474317B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D45/00—Electrical control not provided for in groups F02D41/00 - F02D43/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
    • F02P5/15—Digital data processing
    • F02P5/152—Digital data processing dependent on pinking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
    • F02P5/15—Digital data processing
    • F02P5/153—Digital data processing dependent on combustion pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D2041/1413—Controller structures or design
    • F02D2041/1432—Controller structures or design the system including a filter, e.g. a low pass or high pass filter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F02D41/28—Interface circuits
    • F02D2041/286—Interface circuits comprising means for signal processing
    • F02D2041/288—Interface circuits comprising means for signal processing for performing a transformation into the frequency domain, e.g. Fourier transformation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
    • F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
    • F02P17/12—Testing characteristics of the spark, ignition voltage or current
    • F02P2017/125—Measuring ionisation of combustion gas, e.g. by using ignition circuits
    • F02P2017/128—Measuring ionisation of combustion gas, e.g. by using ignition circuits for knock detection

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Ignition Timing (AREA)

Abstract

The present invention relates to method for knock detection and ignition timing control method, ITCS Ignition Timing Control System, which has：The step of obtaining the vibrational waveform generated by the indoor burning of burning；First time window before when becoming maximum maximum internal pressure in a combustion period to being pressed in in the combustion chamber and when positioned at and then maximum internal pressure after the second time window the step of setting, the second waveform portion for being included in first waveform part in the vibrational waveform, being included in first time window and the second time window is transformed to frequency domain presentation respectively；And the amplitude of extraction frequency domain presentation of first waveform part in first frequency window becomes maximum first peak value and the amplitude of the frequency domain presentation of the second waveform portion becomes maximum second peak value in second frequency window, and based on the second peak value and the first peak value to whether producing the step of pinking judges.

Description

Method for knock detection, ignition timing control method and ITCS Ignition Timing Control System
Technical field
The present invention is related to for detecting the generation detection method of situation of the pinking in internal combustion engine.The present invention also with according to profit The pinking detected with the detection method generates the ignition timing control that situation suitably controls the ignition timing of internal combustion engine Method processed and the control system correlation that the ignition timing of internal combustion engine is controlled using the ignition timing control method.
Background technology
In general, the ignition timing in each combustion period of internal combustion engine more shifts to an earlier date, then efficiency is higher, but then, Ignition timing more shifts to an earlier date, then the possibility that pinking is generated because burning indoor abnormal combustion more increases.Pinking refers to Also burn the item of surplus remainder of exhaust gas auto-ignition, the impact generated by the auto-ignition in combustion chamber without burning after firing Wave can destroy the thermal boundary layer for the internal face for being formed in combustion chamber.Therefore, the surface temperature of the internal face of combustion chamber can be made excessive Rise and damages combustion chamber.Therefore, in order to make internal combustion engine use up while avoiding the damage of the internal combustion engine generated by pinking as possible It may expeditiously operate, the efficiency for being preferably based on internal combustion engine improves the compromise between the reduction of detonation frequency suitably to control The ignition timing of internal combustion engine processed.
For this purpose, the generation situation of the indoor pinking of burning of detection internal combustion engine becomes critically important as precisely as possible.As The citation for disclosing the detection method of pinking enumerates patent document 1 below.That as described in patent document 1 Sample uses pinking severity in the past as the evaluation index of knock intensity.But it is detected based on the pinking severity quick-fried Shake testing result and actual observation to the example that contradicts of typical detonation characteristic it is visible everywhere.
On the other hand, in patent document 1, as than the excellent method for knock detection of detection based on pinking severity, Disclose the knock determination method that can be detected in advance and be possible to the significantly generation of the larger pinking of damage combustion chamber.It is specific and Speech, in knock determination method described in Patent Document 1, executes determination processing below.First, using pinking time window with And bandpass filter, it is taken out in measurement data from obtained from the sensor measurement internal pressure or acceleration that are set to combustion chamber The waveform signal of detonation frequency is simultaneously integrated and finds out the first operation values.Then, using referential time window and band Bandpass filter takes out the waveform signal of reference frequency from above-mentioned measurement data and is integrated and find out the second operation values, and Multiple combustion periods carry out rolling average and find out with reference to average value.For with reference to average value divided by find out as described above the S/N ratios obtained from one operation values are further weighted processing using weight coefficient, and are moved in multiple combustion periods It is average, to calculate pinking index, and the presence or absence of pinking is judged based on the pinking index.
Citation
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2015-132185 bulletins
Invention content
The subject that the invention solves
But in knock determination method described in Patent Document 1, from the sight that accurately detection pinking generates as far as possible From the point of view of point, and it is not based on rational basis and suitably selects that the time model of pinking time window and reference time window should be set It encloses.Specifically, as described below.
Above-mentioned S/N ratios indicate：Index value と roots obtained from detonation frequency waveform during to being generated according to pinking The case where relatively being compared according to the rolling average of index value obtained from the frequency waveform not generated in a period of pinking Under, the former big much degree.Therefore, in order to keep above-mentioned S/N ratios related to pinking generation possibility with high precision, pinking time window Mouth only includes the possibility of the generation pinking high period in which should not omit.In contrast, it should be set to reference to time window Only include most to be difficult to generate the period of pinking.But in knock determination method described in Patent Document 1, although by pinking Time window is consistent during being set to the burning with combustion chamber, but it does not only include the possibility for generating pinking with not omitting not to be set to The property high period.In addition, in knock determination method described in Patent Document 1, it is set to comprising combustion with reference to time window The unburned period of room is burnt, but it only includes most to be difficult to generate the period of pinking not to be set to.
In view of the above problems, the purpose of several embodiments of the invention is to obtain a kind of method for knock detection, at this In method for knock detection, by be based on it is rational according to come properly select with corresponding time window during pinking generation and with The setting range of corresponding time window during not generating pinking, thus allows for the knock detection of higher precision.Also, The purpose of several embodiments of the invention is to obtain generates situation according to the pinking detected using the method for knock detection The ignition timing control method that suitably controlled the ignition timing of internal combustion engine and uses the ignition timing control method The control system that the ignition timing of internal combustion engine is controlled.
Solution for solving the problem
(1) several embodiments according to the present invention are detected the generation of the indoor pinking of burning of internal combustion engine Method for knock detection has：
The step of obtaining the vibrational waveform generated by the burning of the indoor mixed gas of burning；
First before when becoming maximum maximum internal pressure in a combustion period to being pressed in the burning is indoor Time window and when positioned at the and then maximum internal pressure after the second time window set, and by the vibrational waveform In, the first waveform part that is included in the first time window and the second wave for being included in second time window Shape part is transformed to the step of frequency domain presentation respectively；And
First frequency window and second frequency window are set, the first waveform portion in the first frequency window is extracted The frequency domain of second waveform portion in typical value i.e. the first typical value and the second frequency window of the frequency domain presentation divided The typical value of expression i.e. the second typical value, and based on the relevance between second typical value and first typical value to being It is no to produce the step of pinking is judged.
In the method for above-mentioned (1), maximum crank turn will be become with indoor interior be pressed in a combustion period of burning The corresponding moment definition of angular phasing be maximum internal pressure when, first time window be set as in maximum internal pressure before period, Period after when second time window is set as positioned at and then maximum internal pressure.As a result, positioned at and then most imperial palace The second time window after when pressure only includes the possibility high period for generating pinking with being configured to not omit.In addition, The first time window of period before in maximum internal pressure is configured to only include most to be difficult to generate the time of pinking Section.Therefore, the second time window and first time window correspond respectively to pinking generate during corresponding time window and with Corresponding time window during not generating pinking.In addition, in the method for above-mentioned (1), when corresponding with during pinking generates Between the setting range of window and time window corresponding with during not generating pinking be based on it is rational according to suitably being selected.
On this basis, in the method for above-mentioned (1), based on according to the vibration wave generated by the burning of mixed gas The frequency domain presentation for two waveform portions that in shape, the second time window and first time window separately include and respectively obtain Two typical values generate possibility to evaluate pinking.As a result, in the method for above-mentioned (1), can relatively compare on one side The typical value of frequency spectrum obtained from vibrational waveform during being generated according to pinking and according to not generating shaking in a period of pinking The typical value of frequency spectrum obtained from dynamic waveform evaluates pinking and generates possibility on one side.By described above, the side in above-mentioned (1) In method, by be based on it is rational according to come properly select with corresponding time window during pinking generation and with do not generate pinking During corresponding time window setting range, so as to carry out the knock detection of higher precision.
(2) in an embodiment of the illustration of the present invention, in the method for above-mentioned (1), which is characterized in that described first The amplitude that typical value has the frequency domain presentation of the first waveform part in the first frequency window becomes maximum first Peak value, second typical value have the amplitude of the frequency domain presentation of second waveform portion in the second frequency window at For maximum second peak value, in whether producing the step that pinking is judged, being based on second peak value and institute Relevance between the first peak value is stated to whether producing pinking and judging.
According to the method for above-mentioned (2), in the typical value for seeking frequency domain presentation, if will frequency spectrum song corresponding with the frequency domain presentation The peak value of line then can quickly find out typical value as typical value by simple calculations.Therefore, according to the method for above-mentioned (2), Can quickly be executed with lower calculated load to whether producing the processing that pinking judged.
(3) in an embodiment of the illustration of the present invention, in the method for above-mentioned (1), which is characterized in that described first Typical value has the POA calculated according to the frequency domain presentation of the first waveform part in the first frequency window (Partial Overall, part are overall) value i.e. the first POA values, second typical value have in the second frequency window The interior frequency domain presentation according to second waveform portion and POA values i.e. the 2nd POA values calculated, to whether produce pinking into Row judgement the step in, based on the relevance between the 2nd POA values and the first POA values to whether produce it is quick-fried Shake is judged.
It, will spectrum curve corresponding with the frequency domain presentation in the typical value for seeking frequency domain presentation according to the method for above-mentioned (3) POA (Partial Overall) value as typical value.The power spectrum of the frequency domain presentation is calculated, and based on calculating Power spectrum calculates power spectral density, and then calculates the quadratic sum of the power spectral density near detonation frequency, from And POA values can be obtained.Therefore, in the typical value for seeking frequency domain presentation, if using the POA values calculated as described above as representative Value, then may be accounted the typical value of whole frequency contents near detonation frequency in the frequency domain presentation.Therefore, according to The method of above-mentioned (3), to that in whether producing the processing that pinking is judged, the consideration in the frequency domain presentation can be used to arrive The typical value of whole frequency contents near detonation frequency.
(4) in an embodiment of the illustration of the present invention, in the method for above-mentioned (1)~(3), which is characterized in that institute First frequency window and the second frequency window are stated with comprising the impact generated in the combustion chamber because generating pinking The mode of frequency content in the frequency content of wave, showing as crest frequency is selected.
In the method for above-mentioned (4), the first frequency window and the second frequency window are configured to wrap Frequency in frequency content containing the shock wave generated in the combustion chamber because generating pinking, showing as crest frequency at Point.Therefore, the peak value of frequency spectrum obtained from the vibrational waveform during being generated according to pinking and according to during not generating pinking The peak value of frequency spectrum obtained from interior vibrational waveform, from frequency range near crest frequency intrinsic when being enclosed in pinking generation In be extracted.Moreover, frequency peak obtained from vibrational waveform during being generated according to pinking and according to not generating pinking During vibrational waveform obtained from frequency peak, from being extracted in frequency range near mutually shared peak value.Its result It is, in the method for above-mentioned (4), the frequency spectrum as obtained from relatively comparing the vibrational waveform during being generated according to pinking Peak value and peak value according to frequency spectrum obtained from the vibrational waveform not generated in a period of pinking, so as to more accurately evaluate Pinking generates possibility.
(5) in an embodiment of the illustration of the present invention, in the method for above-mentioned (1)~(4), which is characterized in that institute It states combustion chamber to have in the concubine for being internally provided with spark plug and the main chamber being connected to the concubine via spray orifice, in the internal combustion In each combustion period of machine, the first time window is configured to include the ignition timing of the spark plug.
In the method for above-mentioned (5), above-mentioned first time window is set to include that secondary indoor spark plug is ignited Timing.Here, in the igniting of concubine, there is only a small amount of fuel gas of torch generation, using spark plug directly by point Fire, therefore, it is extremely difficult to generate the pinking caused by abnormal combustion.Moreover, in the igniting of concubine, can observe do not generate it is quick-fried The vibrational waveform generated by the burning of mixed gas in the state of shake.Therefore, by according to including when igniting comprising concubine First time window and with during pinking in obtained from two waveform portions separately including of corresponding second time window The peak value of two frequency spectrums is compared each other, and possibility is generated so as to more accurately evaluate pinking.
(6) in an embodiment of the illustration of the present invention, in the method for above-mentioned (1)~(5), which is characterized in that institute It includes handling as follows that first waveform part or second waveform portion, which are stated, to the transformation of the frequency domain presentation：By the first wave The timed sample sequence of shape part or second waveform portion is transformed to be adopted by each by Fast Fourier Transform (FFT) (FFT) The set that the amplitude of sample frequency is constituted.
In the method for above-mentioned (6), by being answered for the timed sample sequence of first waveform part or the second waveform portion With Fast Fourier Transform (FFT) (FFT), so as to realize the transformation of first waveform part or the second waveform portion to frequency domain presentation. Therefore, multiple (K) converters are set side by side for multiple (K) sample frequencys on frequency axis each, can make Discrete Fourier transform is carried out to multiple timed sample sequences to execute side by side with multiple (K) converters constituted side by side Calculation process.As a result, it is possible to quickly execute the transformation of first waveform part or the second waveform portion to frequency domain presentation.Cause This, even if the rotating speed in bent axle becomes very quickly the pinking for detecting each combustion period in very short time to be needed to generate In the case of, it can also quickly execute the frequency-domain transform of the first waveform part or the second waveform portion that are performed in the judgement.
(7) in an embodiment of the illustration of the present invention, in the method for above-mentioned (1)~(6), in the internal combustion engine The cylinder for constituting the combustion chamber has the indoor internal pressure variation waveform of burning for measuring the internal combustion engine and outputs it interior Analyzer, the indoor internal pressure of burning of the vibrational waveform from the internal combustion engine determined by the inner voltage detecting device is pressed to change It is extracted as higher harmonic component in waveform, the higher harmonic component includes in internal pressure variation waveform, in pinking Intrinsic vibration frequency ingredient when generation.
As the most strong relevant physics of in the physical quantity that can be measured in the combustion chamber of internal combustion engine and knock intensity Amount has the vibration for changing with generating in the combustion chamber based on indoor internal pressure of burning and the acceleration measured.In above-mentioned (7) In method, only by the way that the inner voltage detecting device of simple structure as in-cylinder pressure sensor is arranged in the combustion chamber of internal combustion engine, It is indoor the burning that waveform obtains needed for knock detection can be changed from the indoor internal pressure of burning measured by the inner voltage detecting device Vibrational waveform.At this point, in the method for above-mentioned (7), extraction is intrinsic when pinking generates in the internal pressure variation waveform measured from this Vibration frequency ingredient.As a result, in the method for above-mentioned (7), can only by the internal pressure measured change waveform in, remove with Each stage of combustion period synchronizes the frequency content except the basic frequency ingredient changed and shakes as intrinsic when pinking generates Dynamic frequency ingredient and take out.
(8) in an embodiment of the illustration of the present invention, in the method for above-mentioned (1)~(6), which is characterized in that The cylinder that the combustion chamber is constituted in the internal combustion engine has the indoor acceleration detection waveform of burning for detecting the internal combustion engine And the acceleration transducer output it, the vibrational waveform are used as and are detected by the acceleration transducer in the internal combustion engine To the acceleration detection waveform and obtain.
As the most strong relevant physics of in the physical quantity that can be measured in the combustion chamber of internal combustion engine and knock intensity Amount has the acceleration that the variation based on indoor internal pressure of burning and the vibration generated in the combustion chamber are measured.Side in above-mentioned (8) In method, the acceleration transducer only by the way that simple structure is arranged in the combustion chamber of internal combustion engine, you can from by the acceleration transducer The acceleration measured changes waveform and directly obtains vibrational waveform corresponding with the vibration frequency ingredient intrinsic when pinking generates.
(9) several embodiments according to the present invention,
A kind of ignition timing control method is controlling the igniting lighted a fire to mixed gas in the combustion chamber of internal combustion engine just When, which is characterized in that have：
For the current set ignition timing, the presence or absence of pinking generation is detected according to every combustion period Detecting step；
The variation until current that testing result based on the presence or absence of pinking generation generates pinking frequency becomes Gesture is calculated, and the variation of the ignition timing and the pinking are generated the correlation between frequency and are updated to newest shape The relevant updates step of state；And
Based on the correlation, to the ignition timing rate-determining steps that the ignition timing of the internal combustion engine is controlled,
The detecting step includes following action：
Obtain the vibrational waveform generated by the burning of the indoor mixed gas of burning；
First before when becoming maximum maximum internal pressure in a combustion period to being pressed in the burning is indoor Time window and when positioned at the and then maximum internal pressure after the second time window set, and by the vibrational waveform In, the first waveform part that is included in the first time window and the second wave for being included in second time window Shape part is transformed to frequency domain presentation respectively；
First frequency window and second frequency window are set, the first waveform portion in the first frequency window is extracted The frequency domain of second waveform portion in typical value i.e. the first typical value and the second frequency window of the frequency domain presentation divided The typical value of expression i.e. the second typical value, and based on the relevance between second typical value and first typical value to being It is no to produce pinking and judged.
In the method for above-mentioned (9), the identical method with above-mentioned (1) can be utilized, each burning is accurately detected The pinking in period generates, and the knock detection result based on each combustion period is controlled such that internal combustion engine to ignition timing Ignition timing become best.At this point, the ignition timing in each combustion period more shifts to an earlier date, then the efficiency of internal combustion engine is higher, but another On the one hand, the possibility for generating pinking in the combustion chamber increases.Therefore, in the method for above-mentioned (9), if the effect based on internal combustion engine Rate improves the compromise between the reduction of detonation frequency to suitably control ignition timing, then can be avoided as possible by pinking on one side The damage of the internal combustion engine of generation makes internal combustion engine expeditiously operate as far as possible on one side.
(10) in one embodiment of the present invention, in the method for above-mentioned (9), which is characterized in that the pinking generates Frequency is calculated as the ratio detected in entire combustion period shared by the combustion period for generating pinking.
In the method for above-mentioned (10), pinking generates frequency as the combustion for detecting generation pinking in entire combustion period It burns the ratio shared by the period and calculates.On this basis, in the method for above-mentioned (10), the pinking found out as described above is generated Correlation between frequency and the variation of ignition timing is calculated, and is carried out to the ignition timing of internal combustion engine based on the correlation Control.Therefore, in the method for above-mentioned (10), if the presence or absence of pinking generation is detected for many combustion periods, and being based on should Testing result controls ignition timing, then can will be generated by the deviation of the knock detection precision of each combustion period The influence of error inhibits low.In addition, in the method for above-mentioned (10), if based on for pinking obtained from many combustion periods Testing result controls ignition timing, then can be by the inclined of the sensitivity of sensor base part used in knock detection The influence for the error that difference generates inhibits low.
The effect of invention
By described above, several embodiments according to the present invention, by properly select with pinking generate during it is right The setting range of the time window and time window corresponding with during not generating pinking answered, so as to carry out higher precision Knock detection.
Description of the drawings
Fig. 1 is the figure of the structure of the internal combustion engine and ITCS Ignition Timing Control System that indicate several embodiments of the invention.
Fig. 2 is the flow of the flow of the control action for the ITCS Ignition Timing Control System for illustrating several embodiments of the invention Figure.
Fig. 3 is the feelings for indicating the thermal efficiency of internal combustion engine and pinking index and being changed according to the development situation of crank angle phase The figure of shape.
Fig. 4 is the figure of the structure for the detonation detection device for indicating several embodiments of the invention.
Fig. 5 is the flow that explanation carries out knock detection action using the detonation detection device of several embodiments of the invention Flow chart.
Fig. 6 is the variation waveform of the internal pressure for the combustion chamber for indicating to be determined by the inner voltage detecting device for being set to combustion chamber Figure.
Fig. 7 be two time windows for indicating to set for the vibrational waveform that observes in the combustion chamber and using this two The figure for two waveform portions that a time window takes out.
Fig. 8 is to indicate two waveform portions progress Fast Fourier Transform (FFT) to being taken out using two time windows and obtain FFT analysis results and two frequency windows figure.
Fig. 9 is the progress for indicating several embodiments according to the present invention and generating frequency according to crank angle phase to pinking Situation and the figure of result and the result evaluated based on pinking severity that changed situation is evaluated.
Specific implementation mode
Hereinafter, being illustrated to several embodiments of the invention with reference to attached drawing.But it is recorded as embodiment Or size, material, shape, its relative configuration etc. of structure member shown in the drawings, purport not limits the scope of the present invention Due to this, only illustrate example.
For example, the expressions such as " identical ", " equal " and " homogeneous " are in the statement of the equal state of things, not only indicate tight The equal state in lattice ground, and also illustrate that the state there are tolerance or in the presence of the difference that can obtain this degree of identical function.It is another Aspect, " outfit ", " having ", " having ", " comprising " or this statement of " having " structural element are not to exclude other knots The existing exclusive statement of structure element.
Hereinafter, before being illustrated to several embodiments of the invention, with reference first to Fig. 3 to considering in internal combustion engine Pinking ignition timing control necessity and the point that should attentively improve is specifically described in ignition timing control.It connects It, referring to Fig.1 and Fig. 2 is directed at internal combustion engine to several embodiments according to the present invention while considering knock detection result The control system that ignition timing carries out control illustrates.Then, several embodiments according to the present invention, reference Fig. 4~ Fig. 9 illustrates the method for knock detection implemented in the control system.
Fig. 3 is to indicate that the thermal efficiency of internal combustion engine and pinking index are according to the development situation of crank angle phase in internal combustion engine And the figure of the situation changed.Two the curves 54A and 54B described in Fig. 3 (a) are shown：(first is set in two kinds of conditions Part is set and second condition setting) under when making internal combustion engine carry out trial run, the thermal efficiency is according to the ignition timing of internal combustion engine θigVariation how to change.Here, condition setting refer to when making engine test operate to excess air ratio λ, concubine The value that gas flow Qp, methane value MN and intake air temperature Ts are set is defined.That is, in the point of the middle triangles of Fig. 3 (a) It is such as lower curve that the thermal efficiency of description, which becomes moving curve 54A and the thermal efficiency described with dot change moving curve 54B, that is, as first Condition is set and second condition setting, in the trial run of internal combustion engine, to excess air ratio λ, concubine gas flow Qp, first Alkane value MN and intake air temperature Ts set curve obtained from two different values.In addition, two songs described in Fig. 3 (b) Line 55A and 55B are shown：Under two kinds of conditions identical with example shown in Fig. 3 (a) setting, tried making internal combustion engine When testing operating, ignition timing θ of the frequency according to internal combustion engine is generated based on the pinking that pinking severity calculatesigVariation how to become It is dynamic.The pinking index of the probability correlation of pinking severity is with pinking generates in the operating of internal combustion engine frequency, pinking generation. Previous, it is considered to be the pinking severity the big, and pinking generation frequency, pinking generation probability are intended to bigger.
Known to curve is compared shown in (a) and (b) to Fig. 3：Ignition timing θ in each combustion periodigPhase More shift to an earlier date, then internal combustion engine can be made to be operated with the higher thermal efficiency, but then, ignition timing θigPhase more carry Before, then the possibility for generating pinking because of abnormal combustion in the combustion chamber is also higher.One as the method for coping with the above situation Example, it is contemplated that the efficiency based on internal combustion engine improves the compromise between the reduction of detonation frequency to suitably control the point of internal combustion engine Fiery timing θig.If constituting as described above, the damage of the internal combustion engine caused by pinking can be avoided as possible on one side, make internal combustion on one side Machine expeditiously operates as far as possible.For this reason, it may be necessary to accurately detect the generation frequency of the pinking generated in the operating of internal combustion engine Rate, intensity, and suitably control the ignition timing θ of internal combustion engine in view of the testing result of the pinkingig。
But the typical detonation characteristic phase that the knock detection result detected based on pinking severity is arrived with actual observation Contradictory example is visible everywhere.That is, in the knock detection technology based on pinking severity, it is understood that there may be it is difficult to accurate with high precision Really detect the situation of the generation of pinking.Such as, it can be seen that following example：Make ignition timing θigPhase gradually in advance feelings Under condition, the change moving curve that the pinking based on pinking severity generates frequency shifts to an earlier date amplitude not list relative to the phase of ignition timing It adjusts and is incremented by and trend protruding upward (that is, reduction trend can be seen in advanced phase side compared to maximum) is shown.Then, at this In several embodiments of invention, disclosing can be with the precision higher than the knock detection technology based on pinking severity accurately It detects the testing agency of the generation of pinking and is assembled with the ITCS Ignition Timing Control System of testing agency as described above.
Fig. 1 is to indicate that several embodiments according to the present invention carry out the control system 1 of control to internal combustion engine and make The figure of the gas engine 2 of an example of the internal combustion engine of object in order to control.First, in the control to several embodiments of the invention Before the structure of system 1 illustrates, the gas engine 2 of the control object as control system 1 is said referring to Fig.1 It is bright.It should be noted that in the following embodiments and the accompanying drawings that referring to Fig.1~Fig. 9 is discussed below, to simplify the explanation, combustion gas The hypothesis of engine 2 is constituted as single-cylinder engine.But the following embodiments and the accompanying drawings that referring to Fig.1~Fig. 9 is discussed below Can similarly it be implemented using multicylinder engine.
The piston 6 that gas engine 2 has cylinder 4 and mechanically connect with bent axle 10 via crank 8, by piston 6 Top surface and cylinder 4 volume part delimit space become combustion chamber 12.Crank angle detector 42 is set to bent axle 10, bent Handle roll angle inspection device 42 detects the phase angle of bent axle 10, and the signal (crank angle that will indicate current crank angle phase Phase signal) it is output to aftermentioned control device 100.Also, bent axle 10 with the rotation of rotor and bent axle 10 matchingly into The generator 44 that the mode of row rotation is constituted connects, and generator 44 has according to the current level and voltage level that send out and generates The torque sensor 46 of the detection signal of the output torque of bent axle 10.Torque sensor 46 believes the detection of the output torque of generation Number it is output to aftermentioned output detecting apparatus 300.
Cylinder 4 has inlet valve 18, exhaust valve 22 and spark plug 30 in the top surface of combustion chamber 12.Air inlet piping 14 with into Valve 18 connects, and is connect with air inlet piping 14 for the mixer 24 of mixing air and fuel gas, for supplying fuel gas It is given to the fuel feed pipe 26 of mixer 24 and the air inlet pipe 16 for supplying air to mixer 24 connects with mixer 24 It connects, in the coupling part of mixer 24 and fuel feed pipe 26, is provided with for adjusting to the fuel feed of mixer 24 Fuel control valve 28.On the other hand, exhaust pipe 20 is connect with exhaust valve 22.In addition, the volume of the top surface and cylinder 4 by piston 6 The combustion chamber 12 that part is formed can also have in the concubine 12a for being internally provided with spark plug and via spray orifice 12c and concubine The main chamber 12b of 12a connections.In this case, in the igniting of concubine 12a, the lacking there is only torch generation in concubine 12a The fuel gas of amount is directly ignited using spark plug.In addition, in the main chamber 12b being connected to concubine 12a via spray orifice 12c Existing mixed gas, the torch blown out from spray orifice 12c by means of the igniting of concubine 12a are ignited.
In addition, the inner voltage detecting device 48 for measuring the internal pressure inside combustion chamber 12 is set to cylinder 4, inner voltage detecting device 48 The practical variation for measuring the internal pressure in combustion chamber 12, and within the form of buckling moving curve be output to aftermentioned knock detecting part 110.Inner voltage detecting device 48 for measuring the internal pressure inside combustion chamber 12 is set to cylinder 4, and inner voltage detecting device 48 is practical to be measured The variation of internal pressure in combustion chamber 12, and within buckling moving curve form output.Acceleration transducer 49 is set to cylinder 4, Due to the pressure wave that acceleration transducer 49 is generated with the morphometry of acceleration when mixed gas is in 12 internal-combustion of combustion chamber The vibration generated on the internal face of combustion chamber 12, and be output to using the measured value of the acceleration as acceleration signal aftermentioned Knock detecting part 110.
Then, illustrate that several embodiments according to the present invention carry out gas engine 2 control of control referring to Fig.1 The structure of system 1 processed.Control system 1 shown in FIG. 1 executes the control for being controlled the ignition timing of gas engine 2 Action, ignition timing refer to：In each combustion period of gas engine 2, with crank angle phase come indicate to enter combustion Burn the period timing that the mixed gas in room 12 is lighted a fire.By the way, in order to according to the burning week in gas engine 2 Phase is controlled such that ignition timing becomes the generation situation for most preferably needing to detect indoor pinking of burning as precisely as possible simultaneously Situation is generated based on the pinking detected suitably to determine the ignition timing of each combustion period.Why be in this way because For：Ignition timing in each combustion period of internal combustion engine more shifts to an earlier date, then efficiency is higher, and but then, ignition timing more shifts to an earlier date, The possibility that pinking is then generated because burning indoor abnormal combustion is higher.
Control system 1 has：The air mistake that the excess air ratio for the mixed gas that opposed firing room 12 supplies is calculated The output detecting apparatus 300 of the output torque of surplus rate computing device 200, detection bent axle 10 and the igniting to gas engine 2 The control device 100 that timing is controlled.Excess air ratio computing device 200 is examined from the fuel quantity being connect with fuel feed pipe 26 Survey the detected value of the supply amount of the reception fuel gas of device 210 and the measured value of concubine gas flow Qp.In addition, excess air ratio Computing device 200 from the fuel calorie detector 230 that is connect with fuel feed pipe 26 receive fuel gas caloric value and The detected value of methane value MN, and it is piped the detected value that the air amount detector 220 that 14 connect receives air capacity from air inlet.Separately Outside, air amount detector 220 is built-in with thermometer (not shown) to measure intake air temperature Ts, by the measurement of intake air temperature Ts Value is output to excess air ratio computing device 200.Then, excess air ratio computing device 200 is according to the supply amount of fuel gas Detected value, fuel gas caloric value detected value and air capacity detected value calculate excess air ratio λ and by its with Concubine gas flow Qp, methane value MN, intake air temperature Ts are output to control device 100 together.
Output detecting apparatus 300 receives the electric signal (output turn for the torque detection value for indicating bent axle from torque sensor 46 Square signal), and will indicate that the output torque detection value information of the output torque of bent axle is output to control device with watt(W) 100.In addition, the inner voltage detecting device 48 and acceleration transducer 49 of cylinder 4 are set to, by the survey of the internal pressure inside combustion chamber 12 Definite value and the measured value that the vibration that the internal face of combustion chamber 12 generates is measured as acceleration is output to control device 100。
Control device 100 have knock detecting part 110, relevant updates portion 120, optimum igniting timing operational part 130 and Ignition timing control unit 140.Knock detecting part 110 receives the crank angle phase theta for indicating current from crank angle detector 42 Crank angle phase signal, and current set ignition timing θ is received from ignition timing control unit 140ig.In addition, pinking Test section 110 receives the internal pressure inside combustion chamber 12 from the inner voltage detecting device 48 and acceleration transducer 49 for being set to cylinder 4 The measured value of variation and the measured value for measuring the vibration that the internal face of combustion chamber 12 generates as acceleration.
Then, knock detecting part 110 is based on the interior buckling received from inner voltage detecting device 48 and acceleration transducer 49 The measured value that dynamic measured value and acceleration change, for current set ignition timing θig, according to every combustion period pair The presence or absence of pinking generation is detected.Then, as the knock detection of each combustion period as a result, knock detecting part 110 will Pinking mark value FknockIt is output to relevant updates portion 120.Here, being detected in a combustion period by knock detecting part 110 In produce pinking in the case of, pinking mark value Fknock1 value is taken, generation is quick-fried if not detected in a combustion period Shake, then take 0 value.Knock detecting part 110 is detected and according to every burning the presence or absence of pinking generation according to every combustion period Period and export pinking mark value FknockAction executed repeatedly in defined combustion period number CN.
As the testing result of the presence or absence of pinking generation, relevant updates portion 120 is received from knock detecting part 110 one at CN The CN pinking mark value F that a combustion period is exportedknock.Then, relevant updates portion 120 is based on above-mentioned CN pinking mark value FknockAnd the past a series of knock detection that is received from knock detecting part 110 as a result, to from the past so far The alteration trend that pinking in period generates frequency fk is calculated.Then, relevant updates portion 120 is generated based on current pinking Frequency fk and current set ignition timing θig, by ignition timing θigVariation and pinking generate between the variation of frequency fk Correlation be updated to newest state.It should be noted that pinking generate frequency fk as from the past so far The ratio shared by the combustion period for generating pinking is detected in entire combustion period and is calculated.
Optimum igniting timing operational part 130 is received from related update section 120 to ignition timing θigVariation and pinking generate The newest content that correlation between the variation of frequency fk is described describes information as correlation.In addition, optimum igniting is just When operational part 130 receive concubine gas flow Qp, methane from excess air ratio computing device 200 and output detecting apparatus 300 Value MN, intake air temperature Ts, the calculated value of excess air ratio λ and output torque PmiDetected value.Then, the positive luck of optimum igniting Calculation portion 130 is based on the ignition timing θ for describing information description using the correlationigVariation and pinking generate between the variation of frequency fk Correlation, to determine the ignition timing θ of gas engine 2ig。
In an embodiment of illustration, optimum igniting timing operational part 130 can also determine combustion gas as described below The optimum igniting timing θ of engine 2ig.First, it is based on so far from excess air ratio computing device 200 and output detection Excess air ratio λ, the output torque P that device 300 receivesmi, concubine gas flow Qp, intake air temperature Ts, methane value MN and Ignition timing θigValue, pair with ignition timing θigThe alteration trend of the thermal efficiency of the corresponding gas engine of variation 2 pushed away It is fixed.Then, it is based on ignition timing θigVariation and pinking generate above-mentioned correlation and above-mentioned heat between the variation of frequency fk The alteration trend of efficiency, to determine that the thermal efficiency in view of gas engine 2 improves between the reduction of pinking generation frequency fk Tradeoff optimum igniting timing θig。
It should be noted that in the embodiment of replacement, optimum igniting timing operational part 130 can also be from relevant updates Portion 120 only received from the past so far during in pinking generate the alteration trend of frequency fk.In this case, when When current time pinking generation frequency fk is in increase trend, optimum igniting timing operational part 130 can also determine that combustion gas is started The new ignition timing θ of machine 2igSo that ignition timing θigPostpone compared with current.Conversely, when generating frequency in current time pinking When rate fk is in reduction trend, optimum igniting timing operational part 130 can also determine the new ignition timing θ of gas engine 2ig So that ignition timing θigCompared with current in advance.
Finally, the ignition timing θ that optimum igniting timing operational part 130 will be determined newlyigIt is output to ignition timing control unit 140, the ignition timing θ that ignition timing control unit 140 will be received from optimum igniting timing operational part 130igAs new control Ignition timing θ of the desired value to gas engine 2igIt is controlled.
Then, illustrate that several embodiments according to the present invention control gas engine 2 with reference to the flow chart of Fig. 2 The flow of the control action of system.Since step S21, knock detecting part 110 is fired at one for the processing of flow chart shown in Fig. 2 Burn the vibrational waveform for burning generation in combustion chamber 12 that the period obtains through mixed gas.For the vibrational waveform, Mixed gas when burning, is acted on by the pressure wave that the burning of mixed gas generates in combustion chamber 12 in combustion chamber 12 Wall surface is observed to the vibration generated as continuous wave.
Then, the processing of the flow chart of Fig. 2 enters step S22, and knock detecting part 110 is based on obtaining in a combustion period Vibrational waveform, for current set ignition timing θigTo detect the presence or absence of pinking generation.As a result, as at one Combustion period detects the presence or absence of pinking generation and obtains as a result, knock detecting part 110 exports pinking mark value Fknock。
Then, the processing of the flow chart of Fig. 2 enters step S23, and knock detecting part 110 determined whether in defined burning week Phase number CN detects the presence or absence of pinking generation.If the combustion period number detected to the presence or absence of pinking generation Less than CN, then the processing of the flow chart of Fig. 2 returns to step S21, and otherwise, processing enters step S24.
In the step S24 of the flow chart of Fig. 2, as pinking generate the presence or absence of testing result, relevant updates portion 120 from Knock detecting part 110 receives the CN pinking mark value F exported in the next combustion periods of CNknock.Then, relevant updates portion 120 are based on above-mentioned CN pinking mark value FknockAnd a series of knock detection that the past receives from knock detecting part 110 As a result, to from the past so far during in pinking generate the alteration trend of frequency fk and calculate.Then, Fig. 2 The processing of flow chart enters step S25, and relevant updates portion 120 generates frequency fk and current set point based on current pinking Fiery timing θig, by ignition timing θigVariation and the correlation that generates between the variation of frequency fk of pinking be updated to newest shape State.
Then, the processing of the flow chart of Fig. 2 enters step S26, and optimum igniting timing operational part 130 is from related update section 120 receive to ignition timing θigVariation and pinking generate that the correlation between the variation of frequency fk described it is newest in Hold, information is described as correlation.Then, optimum igniting timing operational part 130 is based on the point for describing information description using the correlation Fiery timing θigVariation and pinking generate the correlation between the variation of frequency fk, to determine the optimum igniting of gas engine 2 Timing θig。
Then, the processing of the flow chart of Fig. 2 enters step S27, the igniting that optimum igniting timing operational part 130 will be determined newly Timing θigIt is output to ignition timing control unit 140.Then, ignition timing control unit 140 will be from optimum igniting timing operational part 130 The ignition timing θ receivedigAs new control targe value to the ignition timing θ of gas engine 2igIt is controlled.Then, The processing of the flow chart of Fig. 2 enters step S28, determines whether should to terminate timing control action of lighting a fire, be judged to should terminating In the case of, terminate the execution of the flow chart of Fig. 2, otherwise, the execution of the flow chart of Fig. 2 returns to step S21.
By described above, referring to Fig.1 and Fig. 2 detects the quick-fried of each combustion period in above-mentioned control system 1 Shake generate, can the knock detection result based on each combustion period to ignition timing θigIt is controlled such that gas engine 2 ignition timing θigAs best.At this point, the ignition timing in each combustion period more shifts to an earlier date, then efficiency is higher, but another party Face, the possibility for generating pinking in the combustion chamber are higher.Therefore, in the present embodiment, if the efficiency based on gas engine 2 The tradeoff between the reduction of pinking generation frequency is improved to suitably control ignition timing θig, then can keep away as possible on one side Exempt from the damage of the gas engine 2 caused by pinking, gas engine 2 is made expeditiously to operate as far as possible on one side.
Then, with reference to Fig. 4~Fig. 8, to how to be realized in the knock detecting part 110 of the control system 1 of Fig. 1 for than The structure for the generation situation that previous high precision accurately detects the pinking in internal combustion engine illustrates.Fig. 4 is for illustrating structure At the figure of the specific internal structure of the knock detecting part 110 of control device 100 shown in FIG. 1.In Fig. 4, knock detecting part 110 are constituted including vibrational waveform acquisition unit 111, temporal frequency transformation component 112 and knock determination portion 113.
Vibrational waveform acquisition unit 111 and the inner voltage detecting device 48 and acceleration being arranged on the cylinder 4 for constituting combustion chamber 12 Sensor 49 is spent to be electrically connected.Vibrational waveform acquisition unit 111 receives the variation to the internal pressure in combustion chamber 12 from inner voltage detecting device 48 Measured value obtained from being measured.In addition, vibrational waveform acquisition unit 111 will be by combustion chamber 12 from the reception of acceleration transducer 49 The pressure wave that interior burning generates acts on the internal face of combustion chamber 12 and the measured value that is measured as acceleration of the vibration that generates. In addition, that the reception crank angle detector 42 of vibrational waveform acquisition unit 111 is exported to knock detecting part 110, current as expression Crank angle phase theta signal crank angle phase signal.
Then, vibrational waveform acquisition unit 111 is changed based on the internal pressure out of the combustion chamber that inner voltage detecting device 48 receives 12 Measured value or the measured value that changes of the acceleration that is received from acceleration transducer 49, obtain through the mixing in combustion chamber 12 The burning of gas and the vibrational waveform generated.Here, the vibrational waveform that should be obtained by vibrational waveform acquisition unit 111 mean include The observation waveform of high frequency (order of magnitude of kHz (kilohertz)) when pinking generates including intrinsic vibration frequency ingredient, the observation Waveform is the subtle vibrational waveform observed on the internal face of combustion chamber 12 when pinking is generated.It is obtained about vibrational waveform How portion 111 is changed based on the internal pressure in combustion chamber 12 or acceleration changes and obtains and generated by the burning in combustion chamber 12 Vibrational waveform, specifically discussed below in the following description using Fig. 5~Fig. 7.When obtaining the vibrational waveform, vibration The vibrational waveform data for indicating the vibrational waveform are output to temporal frequency transformation component 112 by waveform acquisition unit 111.
The temporal frequency transformation component 112 that vibrational waveform data are received from vibrational waveform acquisition unit 111 is obtaining above-mentioned shake First time window TW1 and the second time window TW2 is set on the time shaft of dynamic waveform.First time, window TW1 was when above-mentioned The position before being pressed in in combustion chamber 12 when becoming maximum maximum internal pressure in a combustion period is set on countershaft Set place.Second time window TW2 is when being set to be located at and then maximum internal pressure on above-mentioned time shaft after.About observing The time window being set on to the time shaft of vibrational waveform, is specifically discussed below in the following description using Fig. 5~Fig. 7 It states.Then, temporal frequency transformation component 112 is executed first waveform in the vibrational waveform, being included in first time window The temporal frequency that part WV1 and interior the second waveform portion WV2 for being included of the second time window is transformed to frequency domain presentation respectively becomes Change processing.Finally, temporal frequency transformation component 112 will carry out time frequency to the first waveform part WV1 in first time window TW1 First transformation results R1 obtained from rate transformation and time frequency is carried out to the second waveform portion WV2 in the second time window TW2 The second transformation results R2 is output to knock determination portion 113 obtained from rate transformation.
The knock determination of above-mentioned first transformation results R1 and the second transformation results R2 are received from temporal frequency transformation component 112 Portion 113, obtain the first transformation results R1 and the second transformation results R2 frequency domain in frequency axis on set first frequency window Mouth FW1 and second frequency window FW2.About the frequency in the frequency domain for obtaining the first transformation results R1 and the second transformation results R2 The frequency window being set on rate axis, is specifically discussed below in the following description using Fig. 5~Fig. 8.Then, pinking is sentenced Determine typical value i.e. the first typical value that portion 113 extracts the frequency domain presentation of first waveform part WV1 in first frequency window FW1 P1.Similarly, knock determination portion 113 extracts the representative of the frequency domain presentation of the second waveform portion WV2 in second frequency window FW2 Value is the second typical value P2.Then, knock determination portion 113 is executed based on the pass between the second typical value P2 and the first typical value P1 Whether connection property is to producing the processing that pinking judged.
In an embodiment of illustration, the first typical value P1 can also have the first wave in first frequency window FW1 The amplitude of the frequency domain presentation of shape part WV1 becomes maximum first peak value.Similarly, in the present embodiment, the second typical value The amplitude that P2 can also have the frequency domain presentation of the second waveform portion WV2 in second frequency window FW2 becomes maximum second Peak value.On this basis, in the present embodiment, as based on the relevance between the second typical value P2 and the first typical value P1 The processing that is judged the presence or absence of is generated to pinking, can also based on the relevance between the second peak value and the first peak value to whether Pinking is produced to be judged.
According to the embodiment, in the typical value for seeking frequency domain presentation, if will spectrum curve corresponding with the frequency domain presentation Peak value as typical value, then can quickly find out typical value by simple calculations.It therefore, can according to the embodiment Quickly executed with lower calculated load to whether producing the processing that pinking judged.
In another embodiment illustrated, the first typical value P1 can also have the basis in first frequency window FW1 The frequency domain presentation of first waveform part WV1 and i.e. the first POA values of POA (Partial Overall) value calculated.Similarly, Two typical value P2, which can also have, to be calculated in second frequency window FW2 according to the frequency domain presentation of the second waveform portion WV2 POA values i.e. the 2nd POA values.On this basis, as based on the relevance pair between the second typical value P2 and the first typical value P1 Pinking the presence or absence of generates the processing that is judged, can also based on the relevance between the 2nd POA values and the first POA values to whether Pinking is produced to be judged.
According to the embodiment, in the typical value for seeking frequency domain presentation, by spectrum curve corresponding with the frequency domain presentation POA (Partial Overall) value is as typical value.It is calculated by the power spectrum to the frequency domain presentation, and based on calculating Power spectrum power spectral density is calculated, and then the quadratic sum of the power spectral density near detonation frequency is calculated, So as to obtain POA values.Therefore, in the typical value for seeking frequency domain presentation, if using the POA values calculated as described above as representative Value, then may be accounted the typical value of whole frequency contents near detonation frequency in the frequency domain presentation.Therefore, according to The embodiment, to the consideration in the frequency domain presentation in whether producing the processing that pinking is judged, can be used to quick-fried Shake the typical value of whole frequency contents near frequency.
It is above-mentioned as being executed by vibrational waveform acquisition unit 111, temporal frequency transformation component 112 and knock determination portion 113 A series of processing as a result, for a current combustion period, the presence or absence of detection pinking generates.As a result, pinking is sentenced Determine portion 113 and generates the pinking flag F for indicating whether detect generation pinking in the combustion periodknock.If here, will be defined Combustion period number is set as CN, then whether knock determination portion 113 for each of CN combustion period to generating CN pinking Flag FknockJudged.If only generating less than CN pinking flag F for less than CN combustion periodknock, then knock determination Portion 113 makes execution control return to vibrational waveform acquisition unit 111.Then, start pinking production in order to be directed to next combustion period The presence or absence of raw detection process, vibrational waveform acquisition unit 111 are obtained again by the burning of the mixed gas in combustion chamber 12 The vibrational waveform of generation.
As above a series of processing action as a result, being judged as CN burning week in knock determination portion 113 Each of phase generates CN pinking flag FknockIn the case of, knock determination portion 113 will be for the every of CN combustion period One CN pinking flag F generated as described aboveknockIt is output to relevant updates portion 120.
Then, with reference to Fig. 5~Fig. 8, knock detecting part 110 shown in Fig. 4 several embodiments according to the present invention are held The motion flow of capable method for knock detection illustrates.Fig. 5 is the method for knock detection for indicating knock detecting part 110 and executing The flow chart of execution sequence.Since step S51, vibrational waveform acquisition unit 111 is based on surveying from internal pressure for the processing of the flow chart of Fig. 5 Determine measured value that internal pressure in the combustion chamber 12 that device 48 and acceleration transducer 49 receive changes and acceleration changes Measured value obtains the vibrational waveform generated by the burning of the mixed gas in combustion chamber 12.
In one embodiment, which changes in waveform from the internal pressure in the combustion chamber of gas engine 2 12 and makees Be extracted for higher harmonic component, the higher harmonic component as comprising the internal pressure change it is in waveform, when pinking generates it is solid Ingredient including some vibration frequency ingredients is extracted.As a result, only by constituting the combustion chamber 12 of gas engine 2 The inner voltage detecting device 48 of simple structure as setting in-cylinder pressure sensor in cylinder 4, you can surveyed from by inner voltage detecting device 48 The indoor internal pressure of burning gone out changes waveform and obtains the vibrational waveform in the combustion chamber 12 needed for knock detection.At this point, vibration wave The internal pressure that shape acquisition unit 111 is measured from this, which changes, extracts the vibration frequency ingredient intrinsic when pinking generates in waveform.It shakes as a result, The internal pressure measured only can be changed carry out process (burning of in the waveform, removing with combustion period by dynamic waveform acquisition unit 111 Each stage in period) frequency content except the synchronous basic frequency ingredient changed as the vibration intrinsic when pinking generates frequently Rate ingredient and take out.
In the embodiment of replacement, which is used as constitutes combustion chamber 12 by being set in gas engine 2 Cylinder 4 the acceleration detection waveform that detects of acceleration transducer 49 and obtain.Therefore, in the present embodiment, only logical Cross the acceleration transducer 49 that simple structure is set in the cylinder 4 for constituting the combustion chamber 12 of gas engine 2, you can from by accelerating The acceleration variation waveform that degree sensor 49 is measured directly obtains corresponding with the vibration frequency ingredient intrinsic when pinking generates Vibrational waveform.
Fig. 6 indicates the variation of internal pressure of the vibrational waveform acquisition unit 111 out of the combustion chamber that inner voltage detecting device 48 receives 12 The concrete example of waveform.In each two-dimensional diagram shown in Fig. 6, the longitudinal axis indicates to act on the pressure of the internal face in combustion chamber 12 The size of power, horizontal axis is corresponding with time shaft, and each moment on the time shaft is corresponding with the particular value of crank angle phase theta.Fig. 6's (A) and diagram curve 70A and 70B shown in (B) indicates that internal pressure is surveyed in the case where first imposes a condition and second condition is set respectively Determine device 48 and the variation waveform of the internal pressure in combustion chamber 12 is output to result obtained from vibrational waveform acquisition unit 111.Here, item Part setting refer to when making internal combustion engine operation to excess air ratio λ, concubine gas flow Qp, methane value MN and into temperature The value that degree Ts is set is defined.By (A) and (B) of Fig. 6 it is found that the variation waveform 70A of the internal pressure in combustion chamber 12 with And 70B includes the basic frequency ingredient and expression ratio of variation synchronous with carry out process (each stage of combustion period) of combustion period The radio-frequency component of its subtle vibration.Here, the radio-frequency component and the vibrational waveform pair that should be obtained by vibrational waveform acquisition unit 111 It answers.That is, should mean to be included in vibration frequency intrinsic when pinking generates by the vibrational waveform of the acquirement of vibrational waveform acquisition unit 111 The observation waveform of high frequency including rate ingredient, the observation waveform are observed on the internal face of combustion chamber 12 when pinking is generated Subtle vibrational waveform.
On the other hand, in each two-dimensional diagram shown in Fig. 7, the longitudinal axis indicates to act on the internal face in combustion chamber 12 Pressure size (i.e. the amplitude of waveform), horizontal axis is corresponding with time shaft, each moment on the time shaft and crank angle phase theta Particular value correspond to.Waveform 71A shown in Fig. 7 (A) extracts internal pressure shown in Fig. 6 (A) and changes in waveform 70A and burning week The carry out process (each stage of combustion period) of phase synchronizes the basic frequency ingredient changed and indicates.On the other hand, Fig. 7 (A) institute The waveform 72A shown, which extracts internal pressure shown in Fig. 6 (A) and changes, to be observed in combustion chamber 12 in waveform, when pinking generates The wave of the ingredient of subtle vibrational waveform and higher hamonic wave when being generated included in pinking including intrinsic vibration frequency ingredient It is formed and divides and indicate.That is, when so that gas engine 2 is operated under imposing a condition with Fig. 6 (A) identical first, Fig. 6 (A) institute It is that should be taken by vibrational waveform that the internal pressure shown, which changes in waveform, corresponding with waveform 72A shown in Fig. 7 (A) high frequency waveforms ingredient, Obtain the vibrational waveform that portion 111 obtains.
In addition, waveform 71B shown in Fig. 7 (B), which extracts internal pressure shown in Fig. 6 (B), changes in waveform 70B and burning week The carry out process (each stage of combustion period) of phase synchronizes the basic frequency ingredient changed and indicates.On the other hand, Fig. 7 (B) institute The waveform 72B shown, which extracts internal pressure shown in Fig. 6 (B) and changes, to be observed in combustion chamber 12 in waveform, when pinking generates The wave of the ingredient of subtle vibrational waveform and higher hamonic wave when being generated included in pinking including intrinsic vibration frequency ingredient It is formed and divides and indicate.That is, when so that gas engine 2 is operated under imposing a condition with Fig. 6 (B) identical second, Fig. 6 (B) institute It is that should be taken by vibrational waveform that the internal pressure shown, which changes in waveform, corresponding with waveform 72B shown in Fig. 7 (B) high frequency waveforms ingredient, Obtain the vibrational waveform that portion 111 obtains.When obtaining the vibrational waveform, vibrational waveform acquisition unit 111 will indicate the vibrational waveform Vibrational waveform data are output to temporal frequency transformation component 112.
Then, the processing of the flow chart of Fig. 5 enters step S52A and step S52B.In step S52A, from vibration wave Shape acquisition unit 111 receives the temporal frequency transformation component 112 of vibrational waveform data on the time shaft for obtaining above-mentioned vibrational waveform Set first time window TW1.In addition, in step S52B, temporal frequency transformation component 112 obtain above-mentioned vibrational waveform when The second time window TW2 is set on countershaft.First time, window TW1 was set on above-mentioned time shaft in combustion chamber 12 At position before being inside pressed in when becoming maximum maximum internal pressure in a combustion period.Second time window TW2 is when above-mentioned After when be set on countershaft positioned at and then maximum internal pressure.
The concrete example of the first time window TW1 and the second time window TW2 that are set by temporal frequency transformation component 112 are being schemed 7 (A) are shown as TW1 81A and TW2 82A.It should be noted that Fig. 7 (A) corresponds to Fig. 6 (A) identical the The case where making gas engine 2 operate under one setting condition.In addition, the first time window set by temporal frequency transformation component 112 The concrete example of mouth TW1 and the second time window TW2 is shown in Fig. 7 (B) as TW1 81B and TW2 82B.It needs to illustrate , Fig. 7 (B) correspond to Fig. 6 (B) it is identical second impose a condition under make gas engine 2 operate the case where.
Hereinafter, first time window TW1 shown in Fig. 7 (81B of the 81A and Fig. 7 (B) of Fig. 7 (A)) and second is described in detail The concrete example of time window TW2 (82B of the 82A and Fig. 7 (B) of Fig. 7 (A)).In Fig. 7 (A), moment T12It indicates in combustion chamber 12 In be pressed in a combustion period become maximum maximum internal pressure when at the time of.In Fig. 7 (A), moment T11It indicates compared to most When big internal pressure, that is, moment T12At the time of before stipulated time width, moment T13When indicating compared to maximum internal pressure, that is, moment T12Through At the time of mistake after stipulated time width.In addition, in Fig. 7 (B), moment T22A burning week is pressed in in expression combustion chamber 12 It is interim become maximum maximum internal pressure when at the time of.In Fig. 7 (B), moment T21When indicating compared to maximum internal pressure, that is, moment T22 At the time of before stipulated time width, moment T23When indicating compared to maximum internal pressure, that is, moment T22After stipulated time width Moment.
That is, in Fig. 7 (A), first time window TW1 81A of Fig. 7 (A) is as i.e. moment when being located closely adjacent to maximum internal pressure T12Time interval before and be set to from moment T11To moment T12Until time window.In addition, Fig. 7 (A) second when Between window TW2 82A be used as be located at and then maximum internal pressure when, that is, moment T12Time interval later and be set to from the moment T12To moment T13Until time window.As a result, in Fig. 7 (A), first time window TW1 81A and the second time window Mouth TW2 82A obtain configuration i.e. moment T when with maximum internal pressure on the time shaft of above-mentioned vibrational waveform12It is connected with each other for boundary At position.
In concrete example shown in Fig. 7, by in combustion chamber 12 in be pressed in a combustion period become maximum song T when the corresponding moment definition of handle corner phase is maximum internal pressure12Or T22, first time window TW1 81 (81A, 81B) is set as Period before when being located closely adjacent to maximum internal pressure, when the second time window TW2 82 is set as being located at and then maximum internal pressure it Period afterwards.As a result, period after when positioned at and then maximum internal pressure the second time window TW2 82 (82A, It only include the possibility high period for generating pinking with 82B) being configured to not omit.In addition, when being located closely adjacent to maximum internal pressure The first time window TW1 81 (81A, 81B) of period before is configured to only include most to be difficult to generate the time of pinking Section.Therefore, the second time window TW2 82 (82A, 82B) and first time window TW1 81 (81A, 81B) correspond respectively to Corresponding time window and time window corresponding with during not generating pinking during pinking generates.In addition, in the specific of Fig. 7 Example in, and pinking generate during corresponding time window and time window corresponding with during not generating pinking setting range It is suitably selected based on rational basis.
It should be noted that in the example shown in Fig. 7, first time, window TW1 was selected as being located closely adjacent to most imperial palace Period before when pressure, but first window TW1 also can be in a manner of any time period before in maximum internal pressure It is selected.Even if moreover, in this case, the first time window of any time period before being located in maximum internal pressure TW1 can also be set as only including most to be difficult to generate the period of pinking.
Then, the processing of the flow chart of Fig. 5 enters step S53A and step S53B.In step S53A, temporal frequency Transformation component 112 will be included out of in the vibrational waveform that vibrational waveform acquisition unit 111 receives, first time window TW1 Waveform portion is taken out as first waveform part WV1.In addition, in step S53B, when temporal frequency transformation component 112 is by second Between included in window TW2 waveform portion taken out as the second waveform portion WV2.
In an embodiment shown in Fig. 7 (A), temporal frequency transformation component 112 will connect with from vibrational waveform acquisition unit 111 Waveform portion in the comparable waveform 72A of vibrational waveform received, being included in first time window TW181A is as first Waveform portion WV1 and take out.In an embodiment shown in Fig. 7 (B), temporal frequency transformation component 112 will with from vibrational waveform Waveform in the comparable waveform 72B of vibrational waveform that acquisition unit 111 receives, being included in first time window TW1 81B It is taken out as first waveform part WV1 part.
In addition, in an embodiment shown in Fig. 7 (A), temporal frequency transformation component 112 will with from vibrational waveform acquisition unit Corrugated part in the 111 comparable waveform 72A of vibrational waveform received, being included in the second time window TW2 82A is allocated as It is taken out for the second waveform portion WV2.In an embodiment shown in Fig. 7 (B), temporal frequency transformation component 112 will with from shaking It moves in the comparable waveform 72B of vibrational waveform that waveform acquisition unit 111 receives, the second time window TW2 82B and is included Waveform portion taken out as the second waveform portion WV2.
Then, temporal frequency transformation component 112 execute will the vibrational waveform that be received from self-excited oscillation waveform acquisition unit 111 according to The first waveform part WV1 that first time window TW1 is selected from time domain expression transformation be frequency domain presentation temporal frequency transformation place It manages (step S53A).In addition, temporal frequency transformation component 112 executes the vibration wave that will be received from self-excited oscillation waveform acquisition unit 111 Temporal frequencies of the second waveform portion WV2 that shape is selected according to the second time window TW2 from time domain expression transformation for frequency domain presentation Conversion process (step S53B).
In an embodiment of illustration, the slave time domain of first waveform part WV1 or the second waveform portion WV2 are expressed to frequency The transformation of domain expression includes following processing：The timed sample sequence of first waveform part WV1 or the second waveform portion WV1 are passed through Fast Fourier Transform (FFT) (FFT parsings) and be transformed to the set being made of the amplitude of each sample frequency.Therefore, in this implementation In mode, multiple (K) converters are set side by side for multiple (K) sample frequencys on frequency axis each, it can be with Discrete Fourier transform is carried out to multiple timed sample sequences to execute side by side using multiple (K) converters constituted side by side Calculation process.As a result, it is possible to quickly execute first waveform part WV1 or the second waveform portion WV2 to frequency domain presentation Transformation.Therefore, even if the rotating speed in bent axle becomes very quick and needs to detect the quick-fried of each combustion period in very short time In the case that shake generates, the first waveform part WV1 being performed in the detection or the second waveform portion can also be quickly executed The frequency-domain transform of WV2.
Finally, temporal frequency transformation component 112 will convert (for example, FFT is parsed) by first time window by temporal frequency First waveform part WV1 in TW1 is transformed to the first transformation results R1 obtained from frequency domain presentation and is output to knock determination portion 113 (step S53A).In addition, temporal frequency transformation component 112 will convert (for example, FFT is parsed) by the second time window by temporal frequency The second waveform portion WV2 in mouth TW2 is transformed to the second transformation results R2 obtained from frequency domain presentation and is output to knock determination portion 113 (step S53B).
Then, the processing of the flow chart of Fig. 5 enters step S54A and step S54B.In step S54A, from time frequency Rate transformation component 112 receives the knock determination portion 113 of above-mentioned first transformation results R1, in the frequency domain for obtaining the first transformation results R1 First frequency window FW1 is set on interior frequency axis.In addition, in step S54B, received from temporal frequency transformation component 112 The knock determination portion 113 for stating the second transformation results R2 sets the on the frequency axis in the frequency domain for obtaining the second transformation results R2 Two frequency window FW2.
The concrete example of the first frequency window FW1 and second frequency windows FW2 that set by knock determination portion 113 are at Fig. 8 (A) It is middle to be shown as FW1 83A and FW2 84A.It should be noted that Fig. 8 (A) correspond to Fig. 6 (A) identical first The case where operating gas engine 2 under setting condition.In each two-dimensional diagram shown in Fig. 8 (A), horizontal axis with by kHz (kilohertz) is corresponded to as the frequency axis of physical unit, and the longitudinal axis indicates the amplitude (intensity) under specific frequency.In addition, shown in Fig. 8 (A) Spectrum curve 73A be the first waveform that will be selected from vibrational waveform 72A according to first time window TW1 81A in Fig. 7 (A) Frequency spectrum obtained from part WV1 is converted as temporal frequency transformation from time domain to frequency domain.In addition, frequency spectrum shown in Fig. 8 (A) Curve 74A is the second waveform portion that will be selected from vibrational waveform 72A according to first time window TW2 82A in Fig. 7 (A) Frequency spectrum obtained from WV2 is converted as temporal frequency transformation from time domain to frequency domain.In Fig. 8 (A), first frequency window FW1 83A are set on the frequency axis as the frequency range for partly selecting spectrum curve 73A.In Fig. 8 (A), the Two frequency window FW2 84A are set on the frequency axis as the frequency range for partly selecting spectrum curve 74A.
In addition, the concrete example of the first frequency window FW1 and second frequency window FW2 that are set by knock determination portion 113 exist It is shown as FW1 83B and FW2 84B in Fig. 8 (B).It should be noted that Fig. 8 (B) corresponds to identical as Fig. 6 (B) Second impose a condition under make gas engine 2 operate the case where.In each two-dimensional diagram shown in Fig. 8 (B), horizontal axis with KHz (kilohertz) is corresponded to as the frequency axis of physical unit, the longitudinal axis indicates the amplitude (intensity) under specific frequency.Shown in Fig. 8 (B) Spectrum curve 73B be the first waveform that will be selected from vibrational waveform 72B according to first time window TW1 81B in Fig. 7 (B) Frequency spectrum obtained from part WV1 is converted as temporal frequency transformation from time domain to frequency domain.Spectrum curve shown in Fig. 8 (B) 74B is will to lead to from vibrational waveform 72B according to the second waveform portion WV2 that first time window TW2 82B is selected in Fig. 7 (B) Cross frequency spectrum obtained from time frequency transformation is converted from time domain to frequency domain.In Fig. 8 (B), first frequency window FW1 83B It is set on the frequency axis as the frequency range for partly selecting spectrum curve 73B.In Fig. 8 (B), second frequency window Mouth FW2 84B are set on the frequency axis as the frequency range for partly selecting spectrum curve 74B.
Then, the processing of the flow chart of Fig. 5 enters step S55A and step S55B.In step S55A, knock determination Portion 113 carries out typical value i.e. the first typical value P1 of the frequency domain presentation of the first waveform part WV1 in first frequency window FW1 It calculates.For example, according to an embodiment of illustration, in step S55A, knock determination portion 113 can also be extracted in first frequency The amplitude of the frequency domain presentation of first waveform part WV1 becomes maximum first peak value P1 as the first typical value P1 in window FW1. According to another embodiment, in step S55A, knock determination portion 113 can also extract the basis in first frequency window FW1 The frequency domain presentation of first waveform part WV1 and POA values i.e. the first POA values P1 that calculates are as the first typical value P1.
Similarly, in step S55B, knock determination portion 113 is to the second waveform portion WV2 in second frequency window FW2 Typical value i.e. the second typical value P2 of frequency domain presentation calculated.For example, according to an embodiment of illustration, in step S55B In, knock determination portion 113 can also extract the amplitude of the frequency domain presentation of the second waveform portion WV2 in second frequency window FW2 As maximum second peak value P2 as the second typical value P2.According to another embodiment, in step S55B, knock determination portion 113 can also extract the POA values calculated according to the frequency domain presentation of the second waveform portion WV2 in second frequency window FW2 i.e. 2nd POA values P2 is as the second typical value P2.
It should be noted that in the embodiment of following discussion, to simplify the explanation, the first typical value P1 and second Typical value P2 be assumed to the amplitude as above-mentioned frequency domain presentation as maximum first peak value P1 and the second peak value P2 difference The value of calculating.But even if several embodiments of following discussion in the first typical value P1 and the second typical value P2 as root In the case that the first POA values P1 and the 2nd POA values P2 found out as POA values according to above-mentioned frequency domain presentation is calculated respectively, It can similarly implement, need to pay attention to this point.
In an embodiment shown in Fig. 8 (A), the frequency domain representations spectrum curve 73A of first waveform part WV1 shows Go out.Therefore, in an embodiment shown in Fig. 8 (A), knock determination portion 113 extracts frequency in first frequency window FW1 83A Spectral curve 73A indicates the crest frequency f of peak valuepeak (1)87A and its amplitude P1 91A (step S55A).The peak value extracted herein Frequency fpeak (1)Amplitude P1 91A at 87A become Fig. 8 (A) the first peak value P1 91A in the illustrated example.In addition, in Fig. 8 (A) in an embodiment shown in, the frequency domain representations of the second waveform portion WV2 are shown with spectrum curve 74A.Therefore, in Fig. 8 (A) in an embodiment shown in, knock determination portion 113 extracts spectrum curve 74A in second frequency window FW2 84A and indicates The crest frequency f of peak valuepeak (2)88A and its amplitude P2 92A (step S55B).The crest frequency f extracted hereinpeak (2)88A The amplitude P2 92A at place become Fig. 8 (A) the second peak value P2 92A in the illustrated example.That is, the first peak value P1 91A are frequency spectrums Curve 73A becomes the maximum of peak value in first frequency window FW1 83A.In addition, the second peak value P2 92A are spectrum curves 74A becomes the maximum of peak value in second frequency window FW2 84A.
In an embodiment shown in Fig. 8 (B), the frequency domain representations spectrum curve 73B of first waveform part WV1 shows Go out.Therefore, in an embodiment shown in Fig. 8 (B), knock determination portion 113 extracts frequency in first frequency window FW1 83B Spectral curve 73B indicates the crest frequency f of peak valuepeak (1)87B and its amplitude P1 91B (step S55A).The peak value extracted herein Frequency fpeak (1)Amplitude P1 91B at 87B become Fig. 8 (B) the first peak value P1 91B in the illustrated example.In addition, in Fig. 8 (B) in an embodiment shown in, the frequency domain representations of the second waveform portion WV2 are shown with spectrum curve 74B.Therefore, in Fig. 8 (B) in an embodiment shown in, knock determination portion 113 extracts spectrum curve 74B in second frequency window FW2 84B and indicates The crest frequency f of peak valuepeak (2)88B and its amplitude P2 92B (step S55B).The crest frequency f extracted hereinpeak (2)88A The amplitude P2 92B at place become Fig. 8 (B) the second peak value P2 92A in the illustrated example.That is, the first peak value P1 91B are frequency spectrums Curve 73B becomes the maximum of peak value in first frequency window FW1 83B.In addition, the second peak value P2 92B are spectrum curves 74B becomes the maximum of peak value in second frequency window FW2 84B.
Then, the processing of the flow chart of Fig. 5 enters step S56 and step S57.In step S56 steps S57, pinking Determination unit 113 is executed based on the first peak value P1 extracted respectively from first frequency window FW1 and second frequency window FW2 and the Whether relevance between two peak value P2 is to producing the processing that pinking judged.In embodiment shown in Fig. 8, first Peak value P1 and the second peak value P2 is corresponding with the first peak value P1 91 (91A, 91B) and the second peak value P2 92 (92A, 92B).First Peak value P1 91 (91A, 91B) is spectrum curve 73 (73A, 73B) becomes peak in first frequency window FW1 83 (83A, 83B) The maximum of value.Second peak value P2 92 (92A, 92B) is spectrum curve 74 (74A, 74B) in second frequency window FW2 84 Become the maximum of peak value in (84A, 84B).Therefore, in embodiment shown in Fig. 8, knock determination portion 113 executes and is based on The the first peak value P1 91 and the second peak value P2 extracted respectively from first frequency window FW1 83 and second frequency window FW2 84 Whether relevance between 92 is to producing the processing that pinking judged.
In an embodiment of illustration, in step S56, knock determination portion 113 is by with the second peak value P2 divided by One peak value P1 in step S57, executes following processing so as to find out peak ratio (P2/P1)：Only in the peak ratio (P2/ P1 it has been more than) to be judged in the case of defined threshold value generating pinking.For example, in step S56 shown in Fig. 8, knock determination Portion 113 passes through with the second peak value P2 92 extracted from second frequency window FW2 84 divided by from first frequency window FW1 83 The the first peak value P1 91 extracted, so as to find out peak ratio (P2/P1).Then, in step S57, knock determination portion 113 Execute following processing：Only it has been more than defined threshold alpha (peak ratio in the peak ratio>It is judged to generating in the case of α) quick-fried Shake.In the present embodiment, in step S57, knock determination portion 113 is set as quick-fried in the case where being judged to generating pinking Shake flag Fknock=1, in the case where being judged to not generating pinking, knock determination portion 113 is set as pinking flag Fknock=0.
Then, the processing of the flow chart of Fig. 5 enters step S58.In step S57, if defined combustion period number is set For CN, then whether knock determination portion 113 for each of CN combustion period to generating CN pinking flag FknockIt carries out Judgement.If only generating less than CN pinking flag F for less than CN combustion periodknock, then the execution of the flow chart of Fig. 5 returns to Step S51, knock determination portion 113 make execution control return to vibrational waveform acquisition unit 111.In step S57, by knock determination Portion 113 is judged as that each for being directed to CN combustion period generates CN pinking flag FknockIn the case of, knock determination portion 113 will be for each CN pinking flag F generated of CN combustion periodknockIt is output to relevant updates portion 120, and is tied The execution of the flow chart of beam Fig. 5.
Execute Fig. 5 flow chart as a result, as pinking generate the presence or absence of testing result, relevant updates portion 120 from Knock detecting part 110 receives the CN pinking mark value F exported in the next combustion periods of CNknock.Then, relevant updates portion 120 are based on above-mentioned CN pinking mark value FknockAnd a series of knock detection that the past receives from knock detecting part 110 As a result, to from the past so far during in pinking generate the alteration trend of frequency fk and calculate.It needs to illustrate Be that pinking generates frequency fk and is used as is detecting that the burning for generating pinking is all from past entire combustion period so far Ratio shared by phase and calculate.
By described above, with reference to Fig. 4~Fig. 8, in above-mentioned method for knock detection, will with burn it is indoor in be pressed in one In a combustion period become the corresponding moment definition of maximum crank angle phase be maximum internal pressure when, first time window TW1 Period before being set as in maximum internal pressure.In addition, in the method for knock detection, the second time window TW2 is set as Period after when positioned at and then maximum internal pressure.As a result, the second time after when positioned at and then maximum internal pressure Window TW2 only includes the possibility high period for generating pinking with being configured to not omit.In addition, positioned in maximum internal pressure The first time window TW1 of period before is configured to only include most to be difficult to generate the period of pinking.Therefore, second when Between window TW2 and first time window TW1 correspond respectively to pinking generate during corresponding time window and with not generating it is quick-fried Corresponding time window during shake.In addition, in the method for knock detection, during being generated with pinking corresponding time window and The setting range of time window corresponding with during not generating pinking is based on rational basis and is suitably selected.
On this basis, in the method for knock detection, based on according to the vibration generated by the burning of mixed gas The frequency for two the waveform portions WV1 and WV2 that in waveform, the second time window TW2 and first time window TW1 are separately included Domain is expressed and two peak values P1 and P2 respectively obtaining, and possibility is generated to evaluate pinking.As a result, in the knock detection In method, can relatively compare on one side the peak value of frequency spectrum obtained from vibrational waveform during being generated according to pinking and according to The peak value of frequency spectrum obtained from the vibrational waveform in a period of pinking is not generated, is evaluated pinking on one side and is generated possibility.By with Upper explanation, in the method for knock detection, by being based on reasonably according to corresponding with during pinking generates to properly select The setting range of time window and time window corresponding with during not generating pinking, so as to carry out the quick-fried of higher precision Shake detection.
In addition, in an embodiment of illustration, combustion chamber 12 has the concubine 12a of built-in spark plug and via spray orifice The main chamber 12b that 12c is connected to concubine 12a, in the present embodiment, first time, window TW1 can also be set as described below. That is, first time window TW1 can also be set in each combustion period of gas engine 2 comprising the fire in concubine 12a The ignition timing of Hua Sai.Here, in the igniting of concubine 12a, there is only a small amount of fuel gas of torch generation, utilize fire Flower plug is directly ignited, therefore, it is extremely difficult to generate the pinking caused by abnormal combustion.Moreover, in the igniting of concubine 12a, it can To observe the vibrational waveform generated by the burning of mixed gas in the state of not generating pinking.Therefore, in the present embodiment, By to according to including when igniting comprising concubine 12a first time window TW1 and with during pinking in corresponding second when Between the peak value P1 and P2 of two frequency spectrums obtained from two waveform portions separately including of window TW2 mutually compared, to Pinking can more accurately be evaluated and generate possibility.
In addition, in an embodiment of illustration, first frequency window FW1 and second frequency window FW2 also can be with Including in the frequency content of the shock wave generated in combustion chamber 12 because generating pinking, the frequency that shows as crest frequency The mode of rate ingredient is selected.As a result, the peak value of frequency spectrum obtained from vibrational waveform during being generated according to pinking and According to the peak value of frequency spectrum obtained from the vibrational waveform not generated in a period of pinking, from being enclosed in peak intrinsic when pinking generates It is extracted in frequency range near value frequency.Moreover, frequency peak obtained from vibrational waveform during being generated according to pinking Value and according to frequency peak obtained from the vibrational waveform not generated in a period of pinking, from frequency near mutually shared peak value It is extracted in range.Therefore, in the present embodiment, by relatively comparing the vibrational waveform during being generated according to pinking The peak value of obtained frequency spectrum and peak value according to frequency spectrum obtained from the vibrational waveform not generated in a period of pinking, so as to More accurately evaluation pinking generates possibility.
Then, for the pinking evaluation index calculated in above-mentioned method for knock detection with reference to Fig. 4~Fig. 8, such as with reference to Fig. 9 Under the above-mentioned pinking evaluation index of the research how to be enhanced compared with previous pinking evaluation index.Specifically, as with An example of past pinking evaluation index, it is assumed that pinking severity.On this basis, it is being used as the according to the embodiment of the present invention In the case that ratio between two peak value P2 and the first peak value P1 and the peak ratio that calculates are compared with pinking severity, ginseng According to the evaluation data of Fig. 9, to as the how excellent carry out comparative study of index for indicating pinking generation possibility.
Two the curves 54C and 54D described in Fig. 9 (a) are shown：Two kinds of different conditions are set from Fig. 3 the case where When so that gas engine 2 has been carried out trial run under fixed (third condition is set and fourth condition setting), the thermal efficiency is according to internal combustion The ignition timing θ of machineigVariation how to change.Here, condition setting is referred to when making 2 trial run of gas engine pair The value that excess air ratio λ, concubine gas flow Qp, methane value MN and intake air temperature Ts are set is defined.That is, scheming It is as follows that the thermal efficiency described with the point of triangle in 3 (a), which becomes moving curve 54A and the thermal efficiency described with dot change moving curve 54B, Curve, that is, in the trial run of gas engine 2, as third condition setting and fourth condition setting, to air excess Rate λ, concubine gas flow Qp, methane value MN and intake air temperature Ts set curve obtained from two different values.
In addition, in the case of example shown in Fig. 9, in the curve chart of Fig. 9 (b) and the curve chart of Fig. 9 (c) In, the longitudinal axis indicates that pinking generates frequency, pinking generation frequency and the ratio phase shared by the combustion period for being judged as generating pinking When.Two the curves 55C and 55D described in Fig. 9 (b) are set in two kinds of conditions identical with example shown in Fig. 9 (a) The curve chart obtained under (third condition is set and fourth condition setting).Specifically, curve 55C and 55D are shown：Make When gas engine 2 has carried out trial run, the pinking calculated according to pinking severity generates frequency according to gas engine 2 Ignition timing θigVariation how to change.In addition, two curves 56C and 56D describing in Fig. 9 (c) be with Fig. 9 (a) the curve chart obtained under the identical two kinds of conditions setting of example shown in (third condition is set and fourth condition setting). Specifically, curve 56C and 56D are shown：When making gas engine 2 carry out trial run, according to Fig. 5 the step of The pinking that the peak ratio obtained from the second peak value P2 divided by the first peak value P1 calculates in S56 generates frequency according to internal combustion engine Ignition timing θigVariation how to change.
To being used as ignition timing θ under third condition setting in Fig. 9 (b)igFunction and the pinking that shows generates frequency The change moving curve (55C of Fig. 9 (b)) of rate and fourth condition setting under be used as ignition timing θigFunction and the pinking that shows When the change moving curve (55D of Fig. 9 (b)) of generation frequency is compared, it can understand as follows.That is, the variation for Fig. 9 (b) is bent For line 55C and change moving curve 55D, although condition setting is different, the size that pinking generates frequency can't see significant difference. This excess air ratio λ for being included in the setting item for making condition set, concubine gas flow Qp, methane value MN and into temperature Spend Ts value it is dramatically different in the case of it is also roughly the same.In contrast, to making under third condition setting in Fig. 9 (c) For ignition timing θigFunction and the pinking that shows generates the change moving curve (56C of Fig. 9 (b)) of frequency and is set in fourth condition It fixs as ignition timing θigFunction and change moving curve (55D of Fig. 9 (b)) that the pinking that shows generates frequency is compared When, it can understand as follows.That is, since in the change moving curve 56C of Fig. 9 (c) and between becoming moving curve 56D, condition sets difference, because This, specific notable difference can be seen in the size that pinking generates frequency.
Namely based on pinking severity as ignition timing θigFunction obtained from pinking generate frequency change moving curve, Even if significantly changing condition setting, notable difference will not be shown in the passage of pinking generation rate.In contrast, according to this The embodiment of invention is as ignition timing θigFunction obtained from pinking generate frequency change moving curve, pass through change condition Setting, to show specific notable difference in the passage of pinking generation rate.
In addition, to being used as ignition timing θ under third condition setting in fig.9igFunction and the thermal efficiency that shows Become moving curve (54C of Fig. 9 (a)), according to obtained from pinking severity pinking generate frequency change moving curve (Fig. 9's (b) Change moving curve (Fig. 9 (c) of frequency 55C) and is according to the embodiment of the present invention generated according to pinking obtained from peak ratio 56C) when being compared, can understand as follows.That is, the thermal efficiency is with ignition timing θigDelay gradually shade, on the other hand, According to pinking generation rate obtained from pinking severity to maintain the state of higher value to elapse.The passage of the pinking generation rate from Actual observation to pinking generate frequency from the point of view of it is very unnatural.In contrast, the thermal efficiency is with ignition timing θigDelay it is gradual It shades, on the other hand, according to the embodiment of the present invention, the pinking generation rate obtained according to peak ratio is pushed away with lower value Move, from actual observation to pinking generation rate from the point of view of it is not unnatural.
In addition, to being used as ignition timing θ under fourth condition setting in fig.9igFunction and the thermal efficiency that shows Become moving curve (54D of Fig. 9 (a)), according to obtained from pinking severity pinking generate frequency change moving curve (Fig. 9's (b) The change moving curve (56D of Fig. 9 (c)) that pinking obtained from 55D) and according to the embodiment of the present invention generates frequency carries out pair Than when, can understand as follows.That is, with the thermal efficiency with ignition timing θigDelay and reduce correspondingly, according to pinking severity Obtained from pinking generation rate also reduce, but the passage of pinking generation rate from actual observation to pinking generate frequency from the point of view of It is still very unnatural.In contrast, although the thermal efficiency is with ignition timing θigDelay and reduce, but embodiment party according to the present invention Formula, the pinking obtained according to peak ratio generate frequency and are elapsed in the range of lower value on one side, show reduction trend on one side, from Actual observation to pinking generation rate from the point of view of it is not unnatural.
As described above, by the way that the ratio between the first peak value P1 and the second peak value P2 will be used as according to the embodiment of the present invention Rate and the peak ratio that calculates is used as pinking evaluation index, to be carried out with previous pinking evaluation index compared in high precision Pinking generate detection.This is because：It is different to detect the case where pinking generates from based on previous pinking evaluation index, at this In the embodiment of invention, possibility is generated to evaluate pinking based on the following peak ratio found out like that.That is, the present invention's In embodiment, within the time cycle of a combustion period set two time windows come carry out temporal frequency transformation (for example, FFT is parsed), it finds out as the peak ratio between two frequency spectrums obtained from its result.In addition, reality according to the present invention Mode is applied, by evaluating the presence or absence of pinking generation based on peak ratio, so as to detect the pinking relative to ignition timing General trend.In addition, according to the embodiment of the present invention, by evaluating the presence or absence of pinking generation based on peak ratio, When maximum internal pressure in the combustion chamber 12 seen when being generated with pinking so as to detect it is neighbouring it is discontinuous it is thermogenetic become Roughly the same pinking of gesture generates trend.
Reference sign
1 control system
2 gas engines
4 cylinders
6 pistons
8 cranks
10 bent axles
12 combustion chambers
12a concubines
The main chambers 12b
12c spray orifices
14 air inlets are piped
16 air inlet pipe
18 inlet valves
20 exhaust pipes
22 exhaust valves
24 mixers
26 fuel feed pipes
28 fuel control valves
30 spark plugs
42 crank angle detectors
44 generators
46 torque sensors
48 inner voltage detecting devices
49 acceleration transducers
The change moving curve of 54 (54A, 54B, 54C, 54D) thermals efficiency
The change moving curve of 55 (55A, 55B, 55C, 55D) pinking generation rates
The change moving curve of 56 (56C, 56D) pinking generation rates
70A, 70B internal pressure become moving curve
71 (71A, 71B) basic frequency ingredients
72 (72A, 72B) vibrational waveforms
73 (73A, 73B) spectrum curves
74 (74A, 74B) spectrum curves
100 control devices
110 knock detecting parts
111 vibrational waveform acquisition units
112 temporal frequency transformation components
113 knock determination portions
120 relevant updates portions
130 optimum igniting timing operational parts
140 ignition timing control units
200 excess air ratio computing devices
210 fuel amount detectors
220 air amount detectors
230 fuel calorie detectors
300 output detecting apparatus
CN combustion period numbers
FW1 first frequency windows
FW2 second frequency windows
FknockPinking mark value
MN methane values
The first peak values of P1
The second peak values of P2
PmiOutput torque
Qp concubine gas flows
The first transformation results of R1
The second transformation results of R2
TW1 first time windows
The second time windows of TW2
Ts intake air temperature
WV1 first waveforms part
The second waveform portions of WV2
Fk pinkings generate frequency
Fpeak crest frequencies

Claims (12)

1. a kind of method for knock detection is detected the generation of the indoor pinking of burning of internal combustion engine, which is characterized in that tool It is standby：
The step of obtaining the vibrational waveform generated by the burning of the indoor mixed gas of burning；
First time before when becoming maximum maximum internal pressure in a combustion period to being pressed in the burning is indoor Window and when positioned at the and then maximum internal pressure after the second time window set, and will be in the vibrational waveform , the first waveform part for being included in the first time window and the second waveform for being included in second time window The step of part is transformed to frequency domain presentation respectively；And
First frequency window and second frequency window are set, to the frequency of the first waveform part in the first frequency window The frequency domain presentation of second waveform portion in typical value i.e. the first typical value and the second frequency window of domain expression Typical value i.e. the second typical value is calculated, and based on the relevance pair between second typical value and first typical value Whether the step of pinking is judged is produced.
2. method for knock detection as described in claim 1, which is characterized in that
First typical value have the amplitude of the frequency domain presentation of the first waveform part in the first frequency window at For maximum first peak value,
Second typical value have the amplitude of the frequency domain presentation of second waveform portion in the second frequency window at For maximum second peak value,
To in whether producing the step of pinking judges, based between second peak value and first peak value Relevance to whether producing pinking and judging.
3. method for knock detection as described in claim 1, which is characterized in that
First typical value, which has, to be calculated in the first frequency window according to the frequency domain presentation of the first waveform part I.e. the first POA values of POA (Partial Overall) value gone out,
Second typical value, which has, to be calculated in the second frequency window according to the frequency domain presentation of second waveform portion The POA values gone out i.e. the 2nd POA values,
To in whether producing the step of pinking judges, based on the 2nd POA values and the first POA values it Between relevance to whether producing pinking and judging.
4. method for knock detection according to any one of claims 1 to 3, which is characterized in that
The first frequency window and the second frequency window because generating pinking in the combustion chamber with comprising generating Shock wave frequency content in, the mode of frequency content that shows as crest frequency selected.
5. method for knock detection as described in any one of claims 1 to 4, which is characterized in that
The combustion chamber has in the concubine for being internally provided with spark plug and the main chamber being connected to the concubine via spray orifice,
In each combustion period of the internal combustion engine, the first time window is being configured to the igniting comprising the spark plug just When.
6. such as method for knock detection according to any one of claims 1 to 5, which is characterized in that
The first waveform part or second waveform portion include following processing to the transformation of the frequency domain presentation：It will be described The timed sample sequence of first waveform part or second waveform portion by Fast Fourier Transform (FFT) (FFT) be transformed to by The set that the amplitude of each sample frequency is constituted.
7. such as method for knock detection according to any one of claims 1 to 6, which is characterized in that
The cylinder that the combustion chamber is constituted in the internal combustion engine has the indoor internal pressure variation of burning for measuring the internal combustion engine Waveform and the inner voltage detecting device output it,
The indoor internal pressure of burning of the vibrational waveform from the internal combustion engine determined by the inner voltage detecting device changes waveform Middle to be extracted as higher harmonic component, the higher harmonic component includes in internal pressure variation waveform, is generated in pinking When intrinsic vibration frequency ingredient.
8. such as method for knock detection according to any one of claims 1 to 6, which is characterized in that
The cylinder that the combustion chamber is constituted in the internal combustion engine has the indoor acceleration inspection of burning for detecting the internal combustion engine The acceleration transducer surveyed waveform and output it,
The vibrational waveform is as the acceleration detection wave detected by the acceleration transducer in the internal combustion engine Shape and obtain.
9. a kind of ignition timing control method, the igniting lighted a fire to mixed gas in the combustion chamber of internal combustion engine is being controlled just When, which is characterized in that have：
For the current set ignition timing, the detection that the presence or absence of pinking generation is detected according to every combustion period Step；
Based on the pinking generate the presence or absence of testing result to pinking generate frequency the alteration trend until current into Row calculates, and the variation of the ignition timing and the pinking are generated the correlation between frequency and are updated to newest state Relevant updates step；And
Based on the correlation, to the ignition timing rate-determining steps that the ignition timing of the internal combustion engine is controlled,
The detecting step includes following action：
Obtain the vibrational waveform generated by the burning of the indoor mixed gas of burning；
First time before when becoming maximum maximum internal pressure in a combustion period to being pressed in the burning is indoor Window and when positioned at the and then maximum internal pressure after the second time window set, and will be in the vibrational waveform , the first waveform part for being included in the first time window and the second waveform for being included in second time window Part is transformed to frequency domain presentation respectively；
First frequency window and second frequency window are set, the first waveform part in the first frequency window is extracted The frequency domain presentation of second waveform portion in the typical value of frequency domain presentation i.e. the first typical value and the second frequency window Typical value i.e. the second typical value, and based on the relevance between second typical value and first typical value to whether producing Pinking has been given birth to be judged.
10. ignition timing control method as claimed in claim 9, which is characterized in that
The pinking generate frequency be used as ratio shared by the combustion period for detecting generation pinking in entire combustion period and It calculates.
11. a kind of ITCS Ignition Timing Control System, the igniting lighted a fire to mixed gas in the combustion chamber of internal combustion engine is being controlled just When, which is characterized in that have：
Knock detecting part, the knock detecting part is for the current set ignition timing, according to every combustion period to quick-fried The presence or absence of shake generation is detected；
Relevant updates portion, the relevant updates portion generate frequency based on the testing result that the pinking the presence or absence of generates to pinking Alteration trend until current is calculated, and will be between the variation of the ignition timing and pinking generation frequency Correlation is updated to newest state；
Optimum igniting timing operational part, the optimum igniting timing operational part determine the internal combustion engine based on the correlation Optimum igniting timing；And
Ignition timing control unit, the ignition timing control unit will be determined described best by the optimum igniting timing operational part Ignition timing controls the ignition timing as control targe value,
The knock detecting part includes：
Vibrational waveform acquisition unit, the vibrational waveform acquisition unit is obtained is produced by the burning of the indoor mixed gas of burning Raw vibrational waveform；
Temporal frequency transformation component, the temporal frequency transformation component to it is described burning it is indoor in be pressed in a combustion period at For maximum maximum internal pressure when before first time window and when positioned at the and then maximum internal pressure after the second time Window is set, and by the first waveform part for being included in the vibrational waveform, the described first time window and institute It states the second waveform portion for being included in the second time window and is transformed to frequency domain presentation respectively；And
Knock determination portion, the knock determination portion setting first frequency window and second frequency window, extract the first frequency In typical value i.e. the first typical value and the second frequency window of the frequency domain presentation of the first waveform part in window The typical value of the frequency domain presentation of second waveform portion i.e. the second typical value, and it is based on second typical value and described first Whether relevance between typical value is to producing pinking and judging.
12. ITCS Ignition Timing Control System as claimed in claim 11, which is characterized in that
The pinking generate frequency be used as ratio shared by the combustion period for detecting generation pinking in entire combustion period and It calculates.
CN201680079336.9A 2016-01-22 2016-12-27 Knock detection method, ignition timing control method, and ignition timing control system Active CN108474317B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2016010723A JP6541586B2 (en) 2016-01-22 2016-01-22 Knocking detection method, ignition timing control method and control system for internal combustion engine
JP2016-010723 2016-01-22
PCT/JP2016/088810 WO2017126304A1 (en) 2016-01-22 2016-12-27 Knocking detection method, ignition period control method, and ignition period control system

Publications (2)

Publication Number Publication Date
CN108474317A true CN108474317A (en) 2018-08-31
CN108474317B CN108474317B (en) 2021-06-25

Family

ID=59361661

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201680079336.9A Active CN108474317B (en) 2016-01-22 2016-12-27 Knock detection method, ignition timing control method, and ignition timing control system

Country Status (5)

Country Link
US (1) US10865719B2 (en)
EP (1) EP3392493B1 (en)
JP (1) JP6541586B2 (en)
CN (1) CN108474317B (en)
WO (1) WO2017126304A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112081674A (en) * 2020-09-16 2020-12-15 东风汽车集团有限公司 Method for reducing misjudgment frequency of knocking

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6825553B2 (en) 2017-12-28 2021-02-03 トヨタ自動車株式会社 Internal combustion engine control device
JP7081420B2 (en) * 2018-09-19 2022-06-07 株式会社デンソー Knock determination device and knock control device
JP7081421B2 (en) * 2018-09-19 2022-06-07 株式会社デンソー Knock control device
FR3086391B1 (en) 2018-09-20 2020-10-02 Ifp Energies Now METHOD OF DETERMINING A CLICK INDICATOR BY DETERMINATION OF THE OVERALL PRESSURE IN THE CYLINDER
KR102119872B1 (en) * 2018-12-04 2020-06-05 현대오트론 주식회사 Misfire diagnosis method and system of single cylinder four-stroke engine
KR102119876B1 (en) * 2018-12-04 2020-06-05 현대오트론 주식회사 Misfire diagnosis method and device of single cylinder four-stroke engine
KR102119873B1 (en) * 2018-12-04 2020-06-05 현대오트론 주식회사 Misfire diagnosis method and device of single cylinder four-stroke engine
IT201900004879A1 (en) * 2019-04-01 2020-10-01 Magneti Marelli Spa METHOD FOR THE CONTROL OF THE COMBUSTION OF AN INTERNAL COMBUSTION ENGINE
FR3118101B1 (en) 2020-12-21 2023-04-21 Ifp Energies Now Method for determining a combustion knock indicator by determining local pressure extrema
FR3118102B1 (en) 2020-12-21 2023-05-05 Ifp Energies Now Method for determining a combustion knock indicator from acceleration measurements
JP2023124427A (en) * 2022-02-25 2023-09-06 三菱重工エンジン＆ターボチャージャ株式会社 Knocking determination device and method for engine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1796753A (en) * 2004-12-27 2006-07-05 本田技研工业株式会社 Knocking detection
CN101050730A (en) * 2006-04-06 2007-10-10 玛涅蒂玛瑞利动力系公开有限公司 Power train control method and system
CN101418727A (en) * 2007-10-22 2009-04-29 罗伯特.博世有限公司 Method and device for ascertaining a cylinder pressure feature
CN102735395A (en) * 2012-06-21 2012-10-17 天津大学 On-line diagnosis and control method for knockings of internal-combustion engine
CN103256166A (en) * 2012-02-20 2013-08-21 三菱电机株式会社 Knock control device of internal combustion engine
CN103998768A (en) * 2012-10-31 2014-08-20 日本特殊陶业株式会社 Ignition timing control device and ignition timing control system
WO2015104909A1 (en) * 2014-01-10 2015-07-16 三菱重工業株式会社 Knocking determination device and knocking control device for internal combustion engine

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5578168A (en) * 1978-12-07 1980-06-12 Nippon Soken Inc Feedback type ignition time control device for internal combustion engine
JPS59168272A (en) * 1983-03-15 1984-09-21 Hitachi Ltd Knock control device with highland correction
US4745902A (en) * 1985-05-30 1988-05-24 Honda Giken Kogyo Kabushiki Kaisha Ignition timing control method for internal combustion engine
JP3423862B2 (en) * 1997-07-24 2003-07-07 トヨタ自動車株式会社 Knock control device for internal combustion engine
JPH11173937A (en) * 1997-12-15 1999-07-02 Hitachi Ltd On-vehicle optical fiber in-pipe pressure sensor
JP2007231903A (en) * 2006-03-03 2007-09-13 Yanmar Co Ltd Knocking determining device for internal combustion engine
FR2905142B1 (en) * 2006-08-28 2008-10-24 Inst Francais Du Petrole REAL-TIME ESTIMATION METHOD OF INDICATORS OF COMBUSTION CONDITION OF AN INTERNAL COMBUSTION ENGINE
JP2008157087A (en) * 2006-12-22 2008-07-10 Honda Motor Co Ltd Knocking detection device
JP4445986B2 (en) * 2007-08-21 2010-04-07 本田技研工業株式会社 Control device for determining ignition timing of internal combustion engine
JP4684327B2 (en) * 2008-10-02 2011-05-18 川崎重工業株式会社 Gas engine knocking control device
US8191532B2 (en) * 2009-03-27 2012-06-05 GM Global Technology Operations LLC Method and system for detecting and reducing engine auto-ignition
WO2015033371A1 (en) * 2013-09-03 2015-03-12 Yasueda Shinji Abnormal combustion detection device for engine and abnormal combustion detection method for engine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1796753A (en) * 2004-12-27 2006-07-05 本田技研工业株式会社 Knocking detection
CN101050730A (en) * 2006-04-06 2007-10-10 玛涅蒂玛瑞利动力系公开有限公司 Power train control method and system
CN101418727A (en) * 2007-10-22 2009-04-29 罗伯特.博世有限公司 Method and device for ascertaining a cylinder pressure feature
CN103256166A (en) * 2012-02-20 2013-08-21 三菱电机株式会社 Knock control device of internal combustion engine
CN102735395A (en) * 2012-06-21 2012-10-17 天津大学 On-line diagnosis and control method for knockings of internal-combustion engine
CN103998768A (en) * 2012-10-31 2014-08-20 日本特殊陶业株式会社 Ignition timing control device and ignition timing control system
WO2015104909A1 (en) * 2014-01-10 2015-07-16 三菱重工業株式会社 Knocking determination device and knocking control device for internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112081674A (en) * 2020-09-16 2020-12-15 东风汽车集团有限公司 Method for reducing misjudgment frequency of knocking
CN112081674B (en) * 2020-09-16 2021-11-09 东风汽车集团有限公司 Method for reducing misjudgment frequency of knocking

Also Published As

Publication number Publication date
EP3392493B1 (en) 2023-08-30
JP2017129101A (en) 2017-07-27
CN108474317B (en) 2021-06-25
WO2017126304A1 (en) 2017-07-27
US10865719B2 (en) 2020-12-15
EP3392493A1 (en) 2018-10-24
JP6541586B2 (en) 2019-07-10
EP3392493A4 (en) 2019-01-16
US20200325835A1 (en) 2020-10-15

Similar Documents

Publication Publication Date Title
CN108474317A (en) Method for knock detection, ignition timing control method and ITCS Ignition Timing Control System
Galloni Dynamic knock detection and quantification in a spark ignition engine by means of a pressure based method
Szwaja et al. Comparisons of hydrogen and gasoline combustion knock in a spark ignition engine
CN105927384B (en) For detecting the system and method for the action event of engine
Shu et al. Analysis of onset and severity of knock in SI engine based on in-cylinder pressure oscillations
Worret et al. Application of different cylinder pressure based knock detection methods in spark ignition engines
Diéguez et al. Characterization of combustion anomalies in a hydrogen-fueled 1.4 L commercial spark-ignition engine by means of in-cylinder pressure, block-engine vibration, and acoustic measurements
CN102032055A (en) Method and system for estimating and reducing engine auto-ignition and knock
Shi et al. Statistical study on engine knock oscillation and heat release using multiple spark plugs and pressure sensors
Zembi et al. Modeling of thermal and kinetic processes in non-equilibrium plasma ignition applied to a lean combustion engine
Ghobadian et al. A semi-empirical model to predict diesel engine combustion parameters
Ricci et al. Experimental and numerical investigations of the early flame development produced by a corona igniter
Zembi et al. Numerical simulation of the early flame development produced by a barrier discharge igniter in an optical access engine
Kubesh et al. Analysis of knock in a dual-fuel engine
Bayliff et al. The Effect of EGR on Knock Suppression, Efficiency, and Emissions in a Stoichiometric, Spark Ignited, Natural Gas Engine
CN105626291B (en) Internal combustion engine and its control method
CN109899195A (en) Method and apparatus for controlling multi-cylinder engine
Forte et al. Combined experimental and numerical analysis of knock in spark ignition engines
Giglio et al. Experimental evaluation of reduced kinetic models for the simulation of knock in SI engines
Broekaert et al. Experimental Investigation and Modelling of the In-Cylinder Heat Transfer during Ringing Combustion in an HCCI Engine
Borg et al. Cylinder-pressure-based methods for sensing spark-ignition engine knock
Mesa et al. Combustion stability, RGF and pressure referencing effect on HRR for a high compression ratio SI engine with natural gas lean mixtures
Merola et al. Knocking diagnostics in the combustion chamber of boosted port fuel injection spark ignition optical engine
CN114008311B (en) Device and method for controlling an ignition device with a fuel feed prechamber in an internal combustion engine
Piernikarski et al. Detection of knocking combustion in a spark ignition engine using optical signal from the combustion chamber

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant